ITEM NAME:2pcs For RV Trailer Magnesium Anode Rod Water Heater Anti Corrosion Practical Description: Function: Magnesium Anode Rod Protects your RV water heater from corrosion, prolonging its life. Material: Made of environmental protection magnesium alloy. Magnesium construction is softer and more absorbent than steel. Application: Magnesium rod is mainly used for water heater, heat exchanger, evaporator, boiler, etc. Replacement Parts: Great replacement of the old one. Inspect regularly, rods should be replaced yearly or when the corrosion has eaten approximately 75% of the rod's mass. Easy Use: Measures about 13x115mm/0.5x4.5inch, Uses 1/2inch NPT Thread, easy to install. Specification: Material: Magnesium alloy Color: Silver Size(DxL): About 13x115mm/0.5x4.5inch Pipe Thread: 1/2inch NPT Thread Quantity: 2pcs/pack Package includes: 2pcs x Magnesium Anode Rod Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement..Function: Magnesium Anode Rod Protects your RV water heater from corrosion, prolonging its life. 2pcs x Magnesium Anode Rod. Magnesium construction is softer and more absorbent than steel. Material: Magnesium alloy.